a = 1:3:20
for i in a
    println(i)
end

for i = 1:2, j = 3:4 println((i, j)) end

z = 2
for i = 1:10
    global z = i
end
println(z)

x, y = 1, 2;
function foo()
     x = 2        # assignment introduces a new local
     return x + y # y refers to the global
end;
